CN102497730B - Ceramic substrate assembly and grounding welding method thereof - Google Patents
Ceramic substrate assembly and grounding welding method thereof Download PDFInfo
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- CN102497730B CN102497730B CN201110405194.XA CN201110405194A CN102497730B CN 102497730 B CN102497730 B CN 102497730B CN 201110405194 A CN201110405194 A CN 201110405194A CN 102497730 B CN102497730 B CN 102497730B
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Abstract
The invention relates to a ceramic substrate assembly and a grounding welding method thereof. The ceramic substrate assembly comprises a ceramic circuit substrate, a pressing block and a box body. Limiting convex points are arranged on two sides of the ceramic circuit substrate, welding flux is coated on the ceramic circuit substrate, the ceramic circuit substrate is fixed with the pressing block and fixed in the box body, and a gap is reserved between the outer side of the ceramic circuit substrate and the wall of the box body. The ceramic substrate assembly grounding welding method comprises the following steps: putting the ceramic substrate assembly on a heating board in a welding cabin of a vacuum welding furnace, and closing a cabin door; increasing the temperature to 60 DEG C, retaining the temperature for 1 minute, then vacuuming and filling nitrogen, increasing the temperature to 130 DEG C, retaining the temperature for 1 minute, then increasing the temperature to 200 DEG C, retaining the temperature for 1.5 minutes, then vacuuming and filling nitrogen, reducing the temperature to be lower than a welding paste melting point. According to the ceramic substrate assembly and the grounding welding method, the residue of the welding flux on the ceramic circuit substrate can be extracted by vacuumizing, the problem of accumulation of the residues of the welding flux in the traditional welding method can be avoided, the penetration rate is increased, the cleaning is easier, and the operation is convenient.
Description
Technical field
The present invention relates to ceramic substrate, relate in particular to a kind of ceramic substrate assembly and grounding welding method thereof.
Background technology
Microwave components based on ceramic technology development has the technical advantages such as high density of integration, multiple circuit function and high reliability.Between ceramic substrate and box body, quality of connection has directly determined ground connection performance and the heat radiation situation of product.At present, being connected between bottom external ceramic circuit board and box body generally adopts method for welding to realize, the scolder that method for welding is used comprises two kinds, solder sheet and scolder, solder sheet is because surface exists oxidation situation in various degree, in large-area welding process, be difficult to thorough reduction, cause forming welding cavity at solder side.Document LTCC circuit substrate large area ground connection soldering processes design (application foundation and the 15th 3 phases of volume of engineering science journal, Xie Qilin, Zhu Qizheng, Lin Weicheng, Lei Danggang, 358-361 page) introduced a kind of method for welding, first at the ltcc substrate back side, composition metal rete is set, then preset solder bump, is finally used the weld tabs of descaling in advance in the glove box of inflated with nitrogen, manually to complete welding.The method operation is comparatively complicated, and the accumulation of scolder has hindered the discharge of scolder in welding process, and a large amount of solder residue are in solder side, form welding cavity, in the post bake process of later process, will pollute, in addition, scolder residual in gap cleans also more difficult.
Summary of the invention
For above-mentioned shortcoming, the technical issues that need to address of the present invention are to provide a kind of ceramic substrate assembly and grounding welding method thereof.
For achieving the above object, the technical solution used in the present invention is: ceramic substrate assembly, comprise ceramic circuit board, briquetting and box body, described ceramic circuit board both sides are provided with at least one spacing salient point, on described ceramic circuit board, be coated with one deck scolder, on described ceramic circuit board, be fixed with at least one briquetting, described ceramic circuit board is fixed in box body, between described ceramic circuit board outside and box wall, leaves at least gap more than 0.8mm.
Described scolder is SnPbAg scolder, and described solder thickness is 0.1～0.2mm.
A ceramic substrate assembly grounding welding method, described welding method comprises the following steps:
A, described ceramic substrate assembly is put on the heating plate of vacuum brazing stove welding chamber, closed hatch door;
B, temperature in cabin is risen to 60 ℃, and keep 1 minute, then vacuum brazing stove welding chamber is vacuumized, make in cabin vacuum degree below 1mbar;
C, in cabin, be filled with nitrogen, and temperature is risen to 130～140 ℃, keep 1 minute; D, continue temperature in cabin to continue to be warming up to 200 ℃, keeps 1.5 minutes, in maintenance temperature, vacuumize in to cabin, it is more than 1mbar making vacuum degree in cabin;
E, to inflated with nitrogen in cabin, temperature in cabin is down to below scolder fusing point.
Described heating rate 25 ℃/below min.
Advantage of the present invention: utilize to vacuumize the solder residue on ceramic circuit board is extracted out from the gap between ceramic circuit board outside and box wall, avoided the problem of the accumulation of solder residue in traditional welding method, improved penetration rate, cleaned and be also more prone to, easy to operate.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
Fig. 1 is the structural representation of ceramic substrate assembly of the present invention.
Fig. 2 is the vertical view of ceramic substrate assembly of the present invention.
Wherein: 1, ceramic circuit board, 2, spacing salient point, 3, briquetting, 4, box body, 5, scolder.
Embodiment
In order to deepen the understanding of the present invention, below in conjunction with embodiment and accompanying drawing, the invention will be further described, and this embodiment only, for explaining the present invention, does not form limiting the scope of the present invention.
As shown in Figure 1 to Figure 2, ceramic substrate assembly of the present invention, comprise ceramic circuit board 1, briquetting 3 and box body 4, ceramic circuit board 1 both sides are provided with three spacing salient points 2, on ceramic circuit board 1, being coated with a layer thickness is the SnPbAg scolder 5 of 0.1mm, is fixed with two briquettings 3 on ceramic circuit board 1, and ceramic circuit board 1 is fixed in box body 4, wherein, between ceramic circuit board 1 outside and box body 4 walls, leave the gap of 0.8mm.
Above-mentioned ceramic substrate assembly grounding welding method, comprises the following steps:
A, described ceramic substrate assembly is put on the heating plate of vacuum brazing stove welding chamber, closed hatch door;
B, temperature in cabin is risen to 60 ℃, and keeps 1 minute, heating rate 25 ℃/below min, then vacuum brazing stove welding chamber is vacuumized, make in cabin vacuum degree below 1mbar;
C, in cabin, be filled with nitrogen, and temperature is risen to 130 ℃, heating rate keeps 1 minute below at 25 ℃/min;
D, continue temperature in cabin to continue to be warming up to 200 ℃, keep 1.5 minutes, heating rate 25 ℃/below min, in maintenance temperature, vacuumize in to cabin, it is more than 1mbar making vacuum degree in cabin;
E, to inflated with nitrogen in cabin, temperature in cabin is down to below scolder fusing point.
Utilization vacuumizes extracts the solder residue on ceramic circuit board out from the gap between ceramic circuit board outside and box wall, avoided the problem of the accumulation of solder residue in traditional welding method, has improved penetration rate, cleans and is also more prone to, easy to operate.
Claims (1)
1. a ceramic substrate assembly grounding welding method, is characterized in that, described welding method comprises the following steps:
A, ceramic substrate assembly comprise ceramic circuit board, briquetting and box body, described ceramic circuit board both sides are provided with at least one spacing salient point, on described ceramic circuit board, be coated with one deck scolder, on described ceramic circuit board, be fixed with at least one briquetting, described ceramic circuit board is fixed in box body, between described ceramic circuit board outside and box wall, leave at least gap more than 0.8mm, described ceramic substrate assembly is put on the heating plate of vacuum brazing stove welding chamber, close hatch door;
B, with 25 ℃/heating rate below min, temperature in cabin is risen to 60 ℃, and keep 1 minute, then vacuum brazing stove welding chamber is vacuumized, make in cabin vacuum degree below 1mbar;
C, in cabin, be filled with nitrogen, and with 25 ℃/heating rate below min, temperature risen to 130～140 ℃, keep 1 minute;
D, continue, with 25 ℃/heating rate below min, temperature in cabin to be continued to be warming up to 200 ℃, keeps 1.5 minutes, in maintenance temperature, vacuumize in to cabin, it is more than 1mbar making vacuum degree in cabin;
E, to inflated with nitrogen in cabin, temperature in cabin is down to below scolder fusing point.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110405194.XA CN102497730B (en) | 2011-12-08 | 2011-12-08 | Ceramic substrate assembly and grounding welding method thereof |
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| CN201110405194.XA CN102497730B (en) | 2011-12-08 | 2011-12-08 | Ceramic substrate assembly and grounding welding method thereof |
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| CN102497730A CN102497730A (en) | 2012-06-13 |
| CN102497730B true CN102497730B (en) | 2014-05-07 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103273154B (en) * | 2013-04-25 | 2015-08-19 | 西安空间无线电技术研究所 | A kind of microwave multi-cavity partition wall welding technique |
| CN104934336A (en) * | 2015-04-28 | 2015-09-23 | 华东光电集成器件研究所 | Eutectic chip soldering method |
| CN106378508B (en) * | 2016-11-22 | 2019-03-08 | 上海无线电设备研究所 | A kind of vacuum welding method suitable for nanocomposite solders |
| CN106825825B (en) * | 2017-03-26 | 2018-11-13 | 中国电子科技集团公司第十六研究所 | A kind of high penetration rate welding method for the assembling of microwave and millimeter wave device |
| CN108461380B (en) * | 2017-12-22 | 2020-11-20 | 中国电子科技集团公司第四十七研究所 | Control structure and control method for sintering voidage of large-area integrated circuit chip |
| CN110587053A (en) * | 2019-10-21 | 2019-12-20 | 成都泰格微波技术股份有限公司 | Process for reducing welding voidage of welding printed board by adopting polytetrafluoroethylene block |
| CN113319393B (en) * | 2021-04-28 | 2023-11-03 | 马永豪 | Ceramic substrate processing device for secondary press-fit brazing electronic paste |
| CN114309854A (en) * | 2021-12-28 | 2022-04-12 | 中国科学院空天信息创新研究院 | Method and tool suitable for integrated brazing of multiple substrates of box body with two-sided open cavity |
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| WO2000021126A1 (en) * | 1998-10-05 | 2000-04-13 | Kulicke & Soffa Investments, Inc. | Semiconductor copper bond pad surface protection |
| JP4233401B2 (en) * | 2003-07-07 | 2009-03-04 | アルプス電気株式会社 | Circuit board mounting structure in electronic equipment and mounting method thereof |
| CN101866861B (en) * | 2010-05-07 | 2011-10-19 | 贵州振华风光半导体有限公司 | Integration method of high-reliability power hybrid integrated circuit |
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